Winding-key for photographic cameras.



G. BORNMANN.

WINDING KEY POE PHOTOGRAPHIO CAMERAS? APPLICATION FILED NOV. 14, 1911.

1,029,266, Patented June 11,1912.

22% (M 13W gwmz ,1; 2!, MM M COLUMBIA PLANOURAPH CO.,WASHINOTON, D. c.

UNITED STATES PATENT onnicn.

CARL BORNIVIANN, OF BINGHAM'ION, NEW YORK, ASSIGNOR 'IO ANSGO COMPANY,OF BINGHAMTON, NEW YORK.

WINDING-KEY FOR PHOTOGRAPHIC CAMERAS.

Specification of Letters Patent.

Patented June 11, 1912.

Application filed November 14, 1911. Serial No. 660,297.

To all whom it may concern:

Be it known that I, CARL BORNMANN, a citizen of the United States, and aresident of the city of Binghamton, county of Broome, State of New York,have invented a new and useful Improvement in \Vinding- Keys forPhotographic Cameras, of which the following is a full, clear, and exactspecification.

This invention is an. improvement upon the winding key for cameraspatented 'to me in United States Letters Patent No. 970,603 datedSeptember 20, 1910, to which reference is made. In the invention of thatpatent provision was made whereby the winding spool in a film cameracould be freely turned in one direction but rotation in the oppositedirection would be instantly prevented and the construction has provenof great utility.

The present invention is to carry that previous one still farther and toafford means whereby in a relatively inexpensive, reliable and easilyoperated manner, the winding key may be retracted from the inward orprojected position in which it engages with the spool, so'that the spoolmay be readily removed and a new one inserted, and the construction issuch that the key when retracted, by easy and simple manipulation may bemade to permanently retain its retracted position without the necessityfor holding on to it, thus both hands of the operator will be free formanipulating the spool.

The parts involved in the invention are few in number, simple andpermanent in construction and do not materially increase the cost of thedevice.

Referring to the drawings, Figure 1 illustrates an elevation of theinvention as applied to an ordinary folding pocket camera; Fig. 2illustrates a vertical sectional view taken from the front to the rearof the apparatus, the winding key being in its projected position; Fig.3 illustrates a view the same as Fig. 2, excepting that the winding keyis in its retracted position; Fig. 4 illustrates an elevation of thatwhich is shown in Fig. 3; Fig. 5 illustrates a plan View of the interiorof the casing, showing the look ing devices and some of the co-actingparts in section, the cover plate being removed.

In the drawings, 1 represents the camera, 2 the cover plate for thewinding key, 3

a l10rn-like extension from the cover plate, which projects beyond theedge of the camera and serves as a means whereby the usual strap orother handle 4 may be connected by means of a ring 5 or otherwise aspreferred.

6 is a casing made of met-a1 which is fastened to the cover plate in anysuitable manner, as for instance, by screws. The casing contains aslightly dished spring 8, upon which rests a circular movable block 9, asection of which is broken away and within the space thus made thelocking bar 1.0 is located.

11 is a cam shaped part formed on the exterior of a short shaft-likepart 12 which revolves in bearings 13 (see Fig. 3) furnished by theedges of a hole in the cover plate 2 and in a similar bearing 14furnished by the edges of a hole made in the rear plate of the casing 6.This shaft is re cessed at its inner end as at 15 and within this recessis a spring 16 which bears at one end against a shoulder 17 formed atthe inner end of the recess 15 in the shaft 12 and at the other end itabuts against a washer 18 which is held to the key spindle 19 by a plate20 set edgewise in the end of the spindle l9 and which is held by across pin 21 or in any other suitable manner. This plate 20 is adaptedto enter the saw kerf or other recess made for its reception in the endof the cartridge spool. At the other end of the spindle 19 there isanother cross plate 22 similarly connected with the spindle and held bya cross pin 23, or in any other suitable manner.

24 is the winding thumb piece which is preferably pivoted to the crossplate 22 by pivots or pins 25, so that it can be readily folded downwithin the cup-shaped cover plate 2, as usual.

The operation is as follows: The direction of rotation of the windingkey during the winding operation is indicated by the arrow in Figs. 1and 5 and when the winding key is turned in this direction a shoulder 26on the cam shaped part 11 pressing against the movable block 9 (see Fig.5) causes that block and also the locking bar 10 which is pushed aroundby the block to revolve with the spindle. The moment, however, the atiioimmediately takes a bearing upon the locking bar 10 and, inasmuch as allthe parts are made to fit somewhat snugly the ends of this bar, whichrestagainst the inner surface of the recess in the casing 6 in which itis located, will not yield to the pressure of the cam shaped surface,consequently thewinding key will be instantly locked against movement inthat direction although it may again be freely moved or turned in theopposite direction.

WVhen it is desired to remove a cartridge spool from the camera orinsert one therein, itis necessary to withdraw the plate 20 from therecess in the end of the spool spindle. In order to efiect this theoperator, gripping the thumb piece 24 between finger and thumb, willpull it outwardly, thus causing the parts to assume the position shownin Fig. 3, in which the spring 16 is collapsed and the spindle 19 andthe cross plate 20 retracted so that their inner ends do not projectbeyond the plane of the hollow shaft 12 and I prefer toso connect thismechanism with the camera as indicated at Fig. 3, that the inner end ofthe shaft 12 when retracted shall not project beyond the plane of theside ofthe camera. To hold the spindle and connected parts in theirretracted position the thumb piece is given a quarter turn, so that thecross plate 22 shall rest crosswise on the outer end of the shaft 12, asshown in Figs. 3 and 4. The device may be held to the camera in anysuitable way. I prefer to em-ploy screws 27 as shown in Figs. 1, 3 andgood smooth movement of the parts.

The special embodiment of the invention which I have described andillustrated is one form only in which it may be constructed. Variouschanges may be made therein without departing from the essentials of theinvention.

I claim:

A winding key for cameras comprising a I and which engages with thespring, a device on the inner end of the spindle adapted to engage withand turn a cartridge spool and a device on its outer end adapted toengage with and turn the shaft.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

CARL BORNMANN.

Witnesses GEO. W. TOPLIFF, A. DEICHELMANN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents Washington, D. C.

